WO2022165956A1 - Matériau composite, procédé de préparation, logement, procédé de préparation de logement et moteur électrique - Google Patents

Matériau composite, procédé de préparation, logement, procédé de préparation de logement et moteur électrique Download PDF

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WO2022165956A1
WO2022165956A1 PCT/CN2021/083655 CN2021083655W WO2022165956A1 WO 2022165956 A1 WO2022165956 A1 WO 2022165956A1 CN 2021083655 W CN2021083655 W CN 2021083655W WO 2022165956 A1 WO2022165956 A1 WO 2022165956A1
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composite material
parts
fibers
preparation
metal alloy
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PCT/CN2021/083655
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English (en)
Chinese (zh)
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张栋葛
周道畅
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无锡小天鹅电器有限公司
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/06—Unsaturated polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/06—Elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets

Definitions

  • the present application relates to the technical field of polymer composite materials, in particular, to a composite material, a preparation method, a casing, a preparation method of the casing, and a motor.
  • BMC Bulk Molding Compounds
  • the present application aims to solve at least one of the technical problems existing in the prior art or related technologies.
  • a first aspect of the present application provides a composite material.
  • the second aspect of the present application also provides a preparation method.
  • a third aspect of the present application also provides a housing.
  • a fourth aspect of the present application also provides a method for preparing a casing.
  • a fifth aspect of the present application also provides a motor.
  • a first aspect of the present application proposes a composite material, comprising: resin, fiber and metal alloy; wherein, the fiber includes conductive fiber.
  • the composite materials provided herein include resins, conductive fibers, and metal alloys.
  • the metal alloy is melted and directionally gathered at the position of the conductive fiber nodes, thereby forming a three-dimensional fiber network skeleton, that is, the conductive fiber nodes are directionally welded by using the alloy material. It effectively reduces the electrical resistance and thermal resistance at the node position of the conductive fiber, and also enhances its fracture toughness.
  • the composite material also has good formability, low cost, high processing convenience, is suitable for industrialized mass production, and meets various needs of users.
  • the conductive fibers include metal fibers, carbon fibers or other fibers capable of conducting electricity.
  • the melting point of the metal alloy is less than 160°C.
  • the composite material uses a metal alloy with a lower melting point as a raw material.
  • the metal alloy can be melted during the molding process of the composite material, so that the fiber nodes can be welded directionally through the molten metal alloy to construct a three-dimensional fiber network skeleton, which can effectively reduce the resistance and thermal resistance of the fiber node position, and also enhances its fracture toughness.
  • it can reduce the temperature parameters required for composite material molding, avoid resin decomposition, help reduce the possibility of silver streak marks, scorching and other defects, and improve the reliability of composite materials.
  • the conductive fibers in the fibers account for 10% to 90% by weight.
  • the fibers include part of the conductive fibers, and the electrical conductivity and thermal conductivity of the composite material can be improved by adding the conductive fibers.
  • the weight portion of the conductive fibers in the fibers is limited to 10% to 90%, so as to take into account the properties of the composite material. preparation cost.
  • the weight part of the metal alloy is 2% to 50% of the weight part of the fiber, so that the weight parts of the conductive fibers and the metal alloy in the raw material are similar, so that the metal alloy can be directionally gathered at the fiber node position as much as possible. Welding of conductive fiber nodes increases the continuity between fibers, thereby reducing electrical and thermal resistance at fiber node locations.
  • the composite material further includes at least one of the following: a low shrinkage agent, a filler, a mold release agent, an initiator, and a thickener.
  • the volume shrinkage rate of the resin is relatively large, the volume shrinkage rate of the prepared composite material is also relatively large, so that the prepared product has problems such as cracks, subsidence spots, and denaturation.
  • a low shrinkage agent can be added to the resin.
  • fillers By adding fillers, the compactness and surface smoothness of composite materials can be improved.
  • release agent By adding a release agent, the composite material is prevented from adhering to the mold or other board surface, which facilitates the release of the mold and is beneficial to the molding process.
  • an initiator By adding an initiator, the cross-linking curing and polymer cross-linking reaction of polyester are promoted, and the processing and molding efficiency is improved. Thickeners are used to increase the viscosity of composite materials.
  • BMC Bulk Molding Compounds
  • BMC material is a dough-like prepreg made of GF (chopped glass fiber), UP (unsaturated resin), MD (filler) and various additives, which are fully mixed. It has electrical insulation, heat resistance, and flame resistance. Various excellent properties such as high mechanical strength, chemical resistance, weather resistance, dimensional stability and so on.
  • the composite material includes the following raw materials by weight: 50-100 parts of resin, 50-200 parts of fiber, 30-60 parts of low shrinkage agent, 100-300 parts of filler, and 1 part of mold release agent. ⁇ 10 parts, 0.1-4 parts of initiator, 0-5 parts of thickener, 1-200 parts of metal alloy.
  • the raw materials of resin, low shrinkage agent, fiber, filler, mold release agent, initiator, thickener and metal alloy are optimized and selected, combined with the reasonable ratio of each component raw material, the comprehensive optimization can be selected.
  • the excellent performance of each component raw material On the one hand, the products prepared from composite materials have excellent thermal conductivity and resistivity, and at the same time have the advantages of light weight, flame resistance, high mechanical strength, chemical resistance, weather resistance, dimensional stability, etc., and have no pollution and low cost. , high processing convenience.
  • the temperature and pressure required for the composite material forming process can be reduced, and the processing and preparation are facilitated.
  • the thermal conductivity of the composite material without using conductive fibers and metal alloys as raw materials is 0.6W/m ⁇ K ⁇ 0.7W/m ⁇ K, and the resistivity is 30 ⁇ cm ⁇ 40 ⁇ cm.
  • the thermal conductivity of the composite material of the example is 5W/m ⁇ K ⁇ 17W/m ⁇ K, and the resistivity is 0.12 ⁇ cm ⁇ 0.5 ⁇ cm.
  • the composite material further includes at least one of the following: a coloring agent, an antioxidant, a heat stabilizer, an ultraviolet absorber, an antistatic agent, and a surfactant.
  • the composite material further includes at least one of the following: a coloring agent, an antioxidant, a heat stabilizer, an ultraviolet absorber, an antistatic agent, and a surfactant.
  • Colorants are used to color composite materials, and antioxidants are used to alleviate or inhibit the oxidation process of composite materials, thereby preventing composite materials from aging and extending their service life.
  • Thermal stabilizers are used to improve the thermal stability of composite materials.
  • UV absorbers are used to improve the photostability of composite materials and prevent composite materials from decomposing and fading after exposure to light.
  • Antistatic agents are used to reduce the accumulation of static charges in composite materials and prevent potential safety hazards in production and life due to static electricity.
  • Surfactants are used to facilitate material mixing.
  • the weight part of the dyeing agent can be reasonably set according to the required color, and similarly, functional materials such as antioxidants, heat stabilizers, ultraviolet absorbers, antistatic agents, and surfactants can be added as required.
  • the fibers also include non-metal fibers;
  • the composite material includes the following raw materials by weight: 55-65 parts of resin, 45-55 parts of glass fibers, 90-110 parts of conductive fibers, and low shrinkage agent 35-45 parts, fillers 150-190 parts, release agent 1-3 parts, initiator 0.8-1.2 parts, thickener 0.3-0.6 parts, metal alloy 10-30 parts.
  • the fibers also include non-metallic fibers, wherein the non-metallic fibers include at least one of the following: fibers with high fiber strength such as glass fibers, aramid fibers, and basalt fibers, so as to enhance the mechanical properties of the composite material, and at the same time Helps to reduce costs.
  • fibers with high fiber strength such as glass fibers, aramid fibers, and basalt fibers, so as to enhance the mechanical properties of the composite material, and at the same time
  • fibers with high fiber strength such as glass fibers, aramid fibers, and basalt fibers
  • the products prepared from composite materials have excellent thermal conductivity and resistivity, and at the same time have the advantages of light weight, flame resistance, high mechanical strength, chemical resistance, weather resistance, dimensional stability, etc., and have no pollution and low cost. , high processing convenience.
  • the temperature and pressure required for the composite material forming process can be reduced, and the processing and preparation are facilitated.
  • the metal alloy includes at least one of the following: bismuth, tin, lead, indium, silver, and aluminum.
  • the metal alloy includes one or more of bismuth, tin, lead, indium, silver, and aluminum with low melting point and high electrical conductivity, and the above-mentioned metal alloy is added to the composite material to make the composite material forming process
  • metal alloys are melted and oriented to gather at the nodes of conductive fibers to form a three-dimensional network skeleton of fibers, thereby effectively reducing the electrical resistance and thermal resistance at the nodes of conductive fibers, and enhancing their fracture toughness.
  • the electrical and thermal conductivity of the product is greatly improved.
  • a preparation method is also proposed for preparing the composite material proposed in the first aspect.
  • the preparation method includes: subjecting resin and metal alloy to agitation to obtain a mixture; subjecting the mixture and fibers to agitation , to obtain a composite material.
  • the resin and the metal alloy are first stirred uniformly, and then the fibers are added to continue stirring to obtain the composite material.
  • the dispersion of the metal alloy is avoided after the fiber is added.
  • the metal alloy powder with low melting point will be melted, and the metal alloy will be melted and aggregated in the fiber directionally.
  • the position of the conductive fiber node in the conductive fiber node is formed, and the three-dimensional network skeleton of the fiber is formed, that is, the conductive fiber node is directionally welded by the alloy material, which effectively reduces the electrical resistance and thermal resistance of the conductive fiber node position, and also enhances its fracture toughness. While ensuring that the product prepared from the composite material has excellent surface finish, compactness and mechanical strength, the electrical and thermal conductivity of the product is greatly improved.
  • the resin, low shrinkage agent, thickener and initiator are first stirred at a high speed by a disperser ( 1500rpm ⁇ 4000rpm, 10min ⁇ 60min) dispersion, so that the low shrinkage agent and the initiator can be quickly and uniformly mixed with the resin to obtain the first mixture (resin paste).
  • a disperser 1500rpm ⁇ 4000rpm, 10min ⁇ 60min
  • the first mixture, mold release agent, filler, and low-melting point metal alloy powder into a kneader for stirring and dispersion (30rpm ⁇ 60rpm, 3min ⁇ 20min).
  • the resin, the low shrinkage agent, the initiator, the thickening agent and the dyeing agent are stirred together to obtain the first mixture.
  • a shell is also proposed, and the raw material of the shell includes the composite material proposed in the first aspect, or the composite material obtained by the preparation method proposed in the second aspect. Therefore, the shell has all the beneficial effects of the composite material proposed in the first aspect, or the composite material obtained by the preparation method proposed in the second aspect.
  • a method for preparing a shell includes: subjecting the composite material proposed in the first aspect, or the composite material obtained by the preparation method proposed in the second aspect, to a molding or injection molding process, get the shell.
  • the molding conditions are: the mold temperature is 100°C ⁇ 160°C; the mold clamping time is 10s ⁇ 300s; the injection molding conditions are: the temperature is 100°C ⁇ 160°C; the time is 20s ⁇ 300s .
  • the pressure during the molding or injection molding process is 70kg/cm 2 to 150kg/cm 2 .
  • a motor comprising: the casing proposed in the third aspect, or the casing obtained by the method for preparing a casing proposed in the fourth aspect. Therefore, the motor has all the beneficial effects of the casing proposed in the third aspect, or the casing obtained by the manufacturing method of the casing proposed in the fourth aspect.
  • the motor can be applied to electrical equipment such as washing machines, vacuum cleaners, range hoods, and air conditioners.
  • FIG. 1 shows a microscopic schematic diagram of a composite material according to an embodiment of the present application
  • Fig. 2 shows the microscopic schematic diagram of the composite material in Fig. 1 after molding
  • FIG. 3 shows a schematic flowchart of a preparation method according to an embodiment of the present application.
  • the present application proposes a composite material, comprising: resin, fibers and metal alloys; wherein, the fibers include conductive fibers.
  • conductive fibers and metal alloys are added to the composite material, so that during the molding process of the composite material, as shown in FIG.
  • the fiber three-dimensional network skeleton that is, the conductive fiber nodes are welded directionally using alloy materials, thereby effectively reducing the electrical resistance and thermal resistance of the conductive fiber nodes, and also enhancing their fracture toughness.
  • the composite material also has good formability, low cost, high processing convenience, is suitable for industrialized mass production, and meets various needs of users.
  • the composite material further includes at least one of the following: a low shrinkage agent, a filler, a mold release agent, an initiator, and a thickener.
  • the volume shrinkage rate of the resin is relatively large, the volume shrinkage rate of the prepared composite material is also relatively large, so that the prepared product has problems such as cracks, subsidence spots, and denaturation.
  • a low shrinkage agent can be added to the resin.
  • fillers By adding fillers, the compactness and surface smoothness of composite materials can be improved.
  • release agent By adding a release agent, the composite material is prevented from adhering to the mold or other board surface, which facilitates the release of the mold and is beneficial to the molding process.
  • an initiator By adding an initiator, the cross-linking curing and polymer cross-linking reaction of polyester are promoted, and the processing and molding efficiency is improved. Thickeners are used to increase the viscosity of composite materials.
  • the composite material includes the following raw materials by weight: 50-100 parts of resin, 50-200 parts of fiber, 30-60 parts of low shrinkage agent, 100-300 parts of filler, 1-10 parts of mold release agent, and 0.1-10 parts of initiator. 4 parts, 0-5 parts thickener, 1-200 parts metal alloy.
  • the quality of each component raw material can be comprehensively optimized. Excellent performance.
  • the products prepared from composite materials have excellent thermal conductivity and resistivity, and at the same time have the advantages of light weight, flame resistance, high mechanical strength, chemical resistance, weather resistance, dimensional stability, etc., and have no pollution and low cost. , high processing convenience.
  • the temperature and pressure required for the composite material forming process can be reduced, and the processing and preparation are facilitated.
  • the fibers also include non-metal fibers;
  • the composite material includes the following raw materials by weight: 55-65 parts of resin, 45-55 parts of non-metal fibers, 90-110 parts of conductive fibers, 35-45 parts of low shrinkage agent, and 150 parts of filler. ⁇ 190 parts, 1-3 parts of mold release agent, 0.8-1.2 parts of initiator, 0.3-0.6 parts of thickener, 10-30 parts of metal alloy.
  • the non-metallic fibers include at least one of the following fibers: glass fibers, aramid fibers, basalt fibers and other fibers with relatively high fiber strength, thereby enhancing the mechanical properties of the composite material and helping to reduce costs.
  • the thermal conductivity of the composite material without using metal alloys and conductive fibers as raw materials is 0.6W/m ⁇ K ⁇ 0.7W/m ⁇ K, and the resistivity is 30 ⁇ cm ⁇ 40 ⁇ cm.
  • the thermal conductivity of the composite material of the example is 5W/m ⁇ K ⁇ 17W/m ⁇ K, and the resistivity is 0.12 ⁇ cm ⁇ 0.5 ⁇ cm.
  • the weight part of the metal alloy is 2% to 50% of the weight part of the fiber, so that the weight parts of the conductive fiber and the metal alloy in the raw material are similar, so that the metal alloy can be oriented as much as possible. It is conducive to welding conductive fiber nodes, enhances the continuity between fibers, and reduces the electrical resistance and thermal resistance at the fiber node position.
  • resins include unsaturated polyester resins and/or epoxy resins; unsaturated polyester resins include isophthalic resins, bisphenol A vinyl polyesters, epoxy-modified vinyl polyesters, o-phthalic resins, etc.
  • unsaturated polyesters include isophthalic resins, bisphenol A vinyl polyesters, epoxy-modified vinyl polyesters, o-phthalic resins, etc.
  • the resin viscosity is 2000mPa ⁇ s ⁇ 18000mPa ⁇ s, for example, 2500mPa ⁇ s, 4000mPa ⁇ s, 6800mPa ⁇ s, 10000mPa ⁇ s, 12000mPa ⁇ s, 15500mPa ⁇ s, etc.
  • the solid content is 50% ⁇ 70%, which is conducive to improving Water resistance, weather resistance and fiber wettability of composites.
  • the low shrinkage agent includes at least one of the following: saturated polyester type low shrinkage agent, polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polymethyl methacrylate (PMMA), polyvinyl acetate Graft-modified substances such as ester (PVA); viscosity of low shrinkage additive ⁇ 6000mPa ⁇ s, such as 5780mPa ⁇ s, 4420mPa ⁇ s, 4100mPa ⁇ s, 3800mPa ⁇ s, 3200mPa ⁇ s, 2800mPa ⁇ s, 2400mPa ⁇ s etc., the lower the viscosity of the low-shrinkage additive, the better its fluidity, then under the condition of low temperature and low pressure, the dispersion of the low-shrinkage agent in the prepared composite material is also better, the appearance of the product is more uniform, and there are fewer defects .
  • saturated polyester type low shrinkage agent polyethylene
  • PVC polyvinyl chloride
  • PS polys
  • Fillers include at least one of the following: talc, montmorillonite, china clay mica, kaolin, clay, calcium silicate, aluminum silicate, feldspar powder, acid clay, talc clay, sericite, sillimanite, bentonite, glass flakes, plates Rock powder, silicates such as silane, calcium carbonate, chalk, barium carbonate, magnesium carbonate, dolomite and other carbonates, barite powder, sedimentary calcium sulfate, plaster of paris, barium sulfate and other sulfates, water and alumina, etc.
  • the average particle size of the filler is 1 ⁇ m ⁇ 200 ⁇ m, such as 2.5 ⁇ m, 5 ⁇ m, 30 ⁇ m, 90 ⁇ m, 135 ⁇ m, 180 ⁇ m, and the like.
  • the release agent includes at least one of the following calcium stearate (calcium octadecanoate), zinc stearate (zinc octadecanoate), and barium stearate.
  • the average particle size of calcium stearate, zinc stearate or barium stearate is 30 ⁇ m to 100 ⁇ m, for example, 45 ⁇ m, 50 ⁇ m, 70 ⁇ m, 90 ⁇ m, so as to facilitate uniform mixing.
  • the number-average fiber length of the fibers is 3 ⁇ m to 1000 ⁇ m.
  • the number-average fiber length is less than 3 ⁇ m, the surface strength of the molded product is high, and it is difficult to meet the strength requirements of motor plastic sealing; when the number-average fiber length is greater than 1000 ⁇ m, during the molding process, the output will become unstable, The surface of the product is also rough.
  • the initiator that is, the polyester plasticizer, is used to promote the cross-linking curing and polymer cross-linking reaction of polyester.
  • the initiator includes at least one of the following: benzoyl peroxide (BPO), tert-butyl perbenzoate (TBPB), tert-butyl peroxy-2-ethylhexanoate (TBPO), triallyl isocyanurate acid ester (TAIC), dicumyl peroxide (DCP).
  • the metal fibers include at least one of the following: copper fibers, nickel fibers, aluminum fibers, metal-coated carbon fibers, metal-coated glass fibers, and carbon fibers.
  • the features defined in any of the above embodiments are included, and further: the melting point of the metal alloy is less than 160°C.
  • a metal alloy with a lower melting point is used as the raw material for the composite material.
  • the metal alloy can be melted during the molding process of the composite material, so that the fiber nodes can be welded directionally through the molten metal alloy to construct a three-dimensional fiber network skeleton, which can effectively reduce the resistance and thermal resistance of the fiber node position, and also enhances its fracture toughness.
  • it can reduce the temperature parameters required for composite material molding, avoid resin decomposition, help reduce the possibility of silver streak marks, scorching and other defects, and improve the reliability of composite materials.
  • metal alloy powders with a particle size of less than 100 ⁇ m can be used as raw materials for synthesizing composite materials, which is beneficial to the distribution of metal alloys at the nodes of the fibers, so that the constructed three-dimensional network skeleton of the fibers is more complete.
  • the metal alloy powders with smaller particle sizes are melted. Afterwards, unnecessary coating of fibers can be reduced, which is beneficial to reduce the usage amount of metal alloys, thereby saving the preparation cost of composite materials.
  • the metal alloy includes one or more of bismuth (Bi), tin (Sn), lead (Pb), indium (In), silver (Ag), and aluminum (Al) with low melting point and high electrical conductivity
  • the above-mentioned metal alloy is added to the composite material, so that during the molding process of the composite material, the metal alloy is melted and oriented to gather at the node position of the conductive fiber, thereby forming a three-dimensional network skeleton of the fiber, thereby effectively reducing the resistance and thermal resistance of the node position of the conductive fiber, and It also enhances its fracture toughness. While ensuring that the product prepared from the composite material has excellent surface finish, compactness and mechanical strength, the electrical and thermal conductivity of the product is greatly improved. For example, 5 ⁇ m bismuth/lead alloy powder.
  • the features defined in any one of the above embodiments are included, and further: the weight portion of the conductive fibers in the fibers is 10% to 90%.
  • the fibers include part of the conductive fibers, and the electrical conductivity and thermal conductivity of the composite material can be improved by adding the conductive fibers, and the weight portion of the conductive fibers in the fibers is limited to 10% to 90%, for example, 25%, 40%, 60%, 80% to take into account the preparation cost of composite materials.
  • the composite material further includes at least one of the following: a coloring agent, an antioxidant, a heat stabilizer, an ultraviolet absorber, an antistatic agent, Surfactant.
  • the composite material further includes at least one of the following: a coloring agent and an antioxidant.
  • Colorants are used to color composite materials.
  • Antioxidants are used to alleviate or inhibit the oxidation process of composite materials, thereby preventing the aging of composite materials and prolonging their service life.
  • Thermal stabilizers are used to improve the thermal stability of composite materials.
  • the UV absorber is used to improve the photostability of the composite material and prevent the composite material from decomposing and fading after being exposed to light.
  • Antistatic agents are used to reduce the accumulation of static charges in composite materials and prevent potential safety hazards in production and life due to static electricity.
  • Surfactants are used to facilitate material mixing.
  • the coloring agent includes pigments and dyes, but the heat resistance and chemical resistance properties of the dyes are relatively weak, so the composite material of this embodiment is for the purpose of coloring, and pigments can be added thereto.
  • the weight part of the dyeing agent can be reasonably set according to the required color, and similarly, functional materials such as antioxidants, heat stabilizers, ultraviolet absorbers, antistatic agents, and surfactants can be added as required.
  • a preparation method for preparing the composite material proposed in the embodiment of the first aspect.
  • the preparation method includes:
  • Step 202 stirring the resin and the metal alloy to obtain a mixture
  • step 204 the mixture and the fibers are stirred to obtain a composite material.
  • the resin and the metal alloy are first stirred uniformly, and then the fibers are added to continue stirring to obtain a composite material.
  • the dispersion of the metal alloy is avoided after the fiber is added.
  • the metal alloy powder with low melting point will melt, and the metal alloy is melted and aggregated in the fiber directionally.
  • the position of the conductive fiber node in the conductive fiber node is formed, and the three-dimensional network skeleton of the fiber is formed, that is, the conductive fiber node is directionally welded by the alloy material, which effectively reduces the electrical resistance and thermal resistance of the conductive fiber node position, and also enhances its fracture toughness. While ensuring that the product prepared from the composite material has excellent surface finish, compactness and mechanical strength, the electrical and thermal conductivity of the product is greatly improved.
  • the resin, low shrinkage agent, thickener and initiator are firstly dispersed by high-speed stirring through a disperser. (1500rpm ⁇ 4000rpm, 10min ⁇ 60min), so that the low shrinkage agent and the initiator can be quickly and uniformly mixed with the resin to obtain the first mixture (resin paste).
  • the resin, the low shrinkage agent, the initiator, the thickening agent and the dyeing agent are stirred together to obtain the first mixture.
  • a shell is provided, and the raw material of the shell includes the composite material proposed in the first aspect, or the composite material obtained by the preparation method proposed in the second aspect. Therefore, the shell has all the beneficial effects of the composite material proposed in the first aspect, or the composite material obtained by the preparation method proposed in the second aspect.
  • a method for preparing a shell including: the composite material proposed in the embodiment of the first aspect, or the composite material obtained by the preparation method proposed in the embodiment of the second aspect, to Compression or injection molding process to obtain the shell.
  • the metal alloys are melted and oriented to gather at the nodes of the conductive fibers, thereby forming a three-dimensional network skeleton of fibers. That is, the conductive fiber nodes are directionally welded by using the alloy material, thereby effectively reducing the electrical resistance and thermal resistance at the position of the conductive fiber nodes, and also enhancing their fracture toughness. Furthermore, while ensuring that the prepared casing has excellent surface finish, compactness and mechanical strength, the electrical conductivity and thermal conductivity of the casing are greatly improved.
  • the molding conditions are as follows: the mold temperature is 100°C to 160°C, for example, 110°C, 120°C, 130°C, 150°C; the mold clamping time is 10s to 300s, such as 25s, 50s, 75s, 140s, 220s , 280s; the injection molding conditions are: the temperature is 100°C ⁇ 160°C, such as 110°C, 120°C, 130°C, 150°C; the time is 20s ⁇ 300s, such as 30s, 45s, 90s, 120s, 165s, 200s, 275s.
  • the pressure at the time of molding or injection molding is in the range of 70 kg/cm 2 to 150 kg/cm 2 , for example, 80 kg/cm 2 , 100 kg/cm 2 , 120 kg/cm 2 , and 145 kg/cm 2 .
  • a BMC material with high electrical conductivity and high thermal conductivity and a preparation method thereof are proposed.
  • the components of the BMC material in this embodiment are: unsaturated polyester resin 60phr (parts by weight), polystyrene (PS) 40phr, aluminum hydroxide 80phr, calcium carbonate 80phr, zinc stearate 2phr, calcium hydroxide 0.5phr, 1 phr of tert-butyl perbenzoate (TBPB), 50 phr of glass fiber, 100 phr of copper fiber, and 20 phr of Bi/Pb alloy powder with a melting point of 150°C.
  • PS polystyrene
  • TBPB tert-butyl perbenzoate
  • the preparation process of the agglomerate molding compound is to disperse all materials except aluminum hydroxide, calcium carbonate, zinc stearate, fiber and Bi/Pb alloy powder in the above-mentioned raw materials into a resin paste at 3000rpm and 20min through a high-speed disperser. . Then put resin paste, zinc stearate, aluminum hydroxide, calcium carbonate, Bi/Pb alloy powder into the kneader, and stir and disperse at 40 rpm for 10 minutes. After uniformity, add reinforcing fibers and continue to stir and disperse at 40 rpm for 5 minutes. The final bulk molding compound.
  • the low melting point metal alloy powder will be melted and directionally aggregated at the metal fiber node position, thereby effectively reducing the electrical resistance and thermal resistance at the fiber node position, so as to realize the electrical and thermal conductivity of the BMC material.
  • the thermal conductivity of the product after injection or compression molding is 15W/m ⁇ K, and the resistivity is 0.12 ⁇ cm.
  • the aluminum hydroxide is hydrated aluminum hydroxide, the molecular formula is Al(OH) 3 ⁇ xH 2 O, and x is a positive integer.
  • Unsaturated polyester resin is selected from o-phthalic unsaturated polyester resin, which has a solid content of more than 70%, a viscosity of 1800cps, and can form good wettability with reinforcing materials and fillers, and o-phthalic unsaturated polyester resin. Has good electrical and mechanical properties.
  • a BMC material with high electrical conductivity and high thermal conductivity and a preparation method thereof are proposed.
  • the components of the BMC material in this embodiment are: unsaturated polyester resin 80phr (parts by weight), polyethylene (PE) 50phr, china clay 220phr, calcium stearate 6phr, calcium hydroxide 0.35phr, benzoyl peroxide (BPO) 1phr, glass fiber 70phr, copper fiber 70phr, Bi/Pb alloy powder with melting point of 150°C 20phr.
  • unsaturated polyester resin 80phr parts by weight
  • PE polyethylene
  • china clay 220phr china clay 220phr
  • calcium stearate 6phr calcium hydroxide 0.35phr
  • benzoyl peroxide (BPO) 1phr glass fiber 70phr
  • copper fiber 70phr copper fiber 70phr
  • Bi/Pb alloy powder with melting point of 150°C 20phr Bi/Pb alloy powder with melting point of 150°C 20phr.
  • the preparation process of the agglomerate molding compound is to disperse all the above-mentioned raw materials except china clay, calcium stearate, fiber and Bi/Pb alloy powder through a high-speed disperser to form a resin paste at 2000rpm for 30min. Then put resin paste, calcium stearate, porcelain clay, Bi/Pb alloy powder into the kneader, and stir and disperse at 50 rpm for 6 minutes. After uniformity, add reinforcing fibers and continue to stir and disperse at 35 rpm for 4 minutes, and knead into the final dough mold plastic.
  • the low melting point metal alloy powder will be melted and directionally aggregated at the metal fiber node position, thereby effectively reducing the electrical resistance and thermal resistance at the fiber node position, so as to realize the electrical and thermal conductivity of the BMC material.
  • the thermal conductivity of the product after injection or compression molding is 12W/m ⁇ K, and the resistivity is 0.2 ⁇ cm.
  • a motor is also provided, including: the housing provided by the embodiment of the third aspect, or the housing obtained by the manufacturing method of the housing provided by the embodiment of the fourth aspect. Therefore, the motor has all the beneficial effects of the housing provided by the embodiment of the third aspect, or the housing obtained by the manufacturing method of the housing provided by the embodiment of the fourth aspect.
  • the motor can be applied to electrical equipment such as washing machines, vacuum cleaners, range hoods, and air conditioners.
  • the term “plurality” refers to two or more, unless expressly defined otherwise.
  • the terms “installed”, “connected”, “connected”, “fixed”, etc. should be understood in a broad sense.
  • “connected” may be a fixed connection, a detachable connection, or an integral connection;
  • “connected” may be a Directly connected or indirectly connected through an intermediary.
  • the specific meanings of the above terms in this application can be understood according to specific situations.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente demande concerne un matériau composite, un procédé de préparation, un logement, un procédé de préparation de logement et un moteur électrique. Le matériau composite contient une résine, des fibres et un alliage métallique, les fibres comprenant des fibres conductrices. Par conséquent, par ajout des fibres conductrices et de l'alliage métallique dans le matériau composite, l'alliage métallique est fondu et rassemblé de manière directionnelle au niveau des positions des nœuds des fibres conductrices lors du procédé de formage du matériau composite, de sorte qu'une charpente de réseau tridimensionnel de fibres est formée, réduisant ainsi efficacement la résistance électrique et la résistance thermique au niveau des positions des nœuds des fibres conductrices ; en outre, la ténacité du matériau composite est également améliorée, accroissant ainsi grandement la conductivité électrique et la conductivité thermique d'un produit préparé à partir du matériau composite tout en garantissant que le produit présente d'excellents lissé de surface, compacité et résistance mécanique.
PCT/CN2021/083655 2021-02-05 2021-03-29 Matériau composite, procédé de préparation, logement, procédé de préparation de logement et moteur électrique WO2022165956A1 (fr)

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CN202110158113.4A CN114874600A (zh) 2021-02-05 2021-02-05 复合材料、制备方法、壳体、壳体的制备方法和电机
CN202110158113.4 2021-02-05

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CN104099683B (zh) * 2013-04-12 2016-05-25 中国石油化工股份有限公司 一种聚合物/导电填料/金属复合纤维及其制备方法

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US5554678A (en) * 1994-05-19 1996-09-10 Yazaki Corporation Electromagnetic shielding composite
CN1761706A (zh) * 2003-03-14 2006-04-19 陶氏环球技术公司 导电热塑性聚合物组合物
CN101407637A (zh) * 2008-11-21 2009-04-15 华东理工大学 一类纤维增强复合材料及其制备方法
CN103975023A (zh) * 2011-12-09 2014-08-06 第一毛织株式会社 复合物及其模制品
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